Re: [Discuss-gnuradio] Correct usage of gr::io_signature::makev

[Sumit Kumar]

Hi Marcus,

Actually I din't do that since the reference code which I was following, 
i.e.,

fll_band_edge_cc_impl.cc, has no such declaration in the corresponding 
header fll_band_edge_cc_impl.h

Sumit

On 28/04/2018 17:28, Marcus Müller wrote:
> Hi Sumit,
>
> I don't see where `ios` is being declared constantly and/or statically
> before line 31? Does that happen in the header?
>
> Best regards,
> Marcus
> On Sat, 2018-04-28 at 16:51 +0200, Sumit Kumar wrote:
> > Hi,
> > In order to look for correct usage of gr::io_signature::makev, I
> > checked this example https://github.com/gnuradio/gnuradio/blob/master
> > /gr-digital/lib/fll_band_edge_cc_impl.cc
> > and found
> > static int ios[] = {sizeof(gr_complex), sizeof(gr_complex),
> > sizeof(gr_complex), sizeof(float)};
> > static std::vector<int> iosig(ios, ios+sizeof(ios)/sizeof(int));
> > and then use as io_signature::makev(1, 4, iosig))
> > Basically I have to use it in sync_short.cc from gr-ieee 80211 in
> > order to create more inputs.
> > But if I use the above two lines inside the class i.e.
> > sync_short_impl, I get lots of error. I have attached the file for
> > reference. Could you please suggest me correct usage. I can give more
> > information if needed.
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > ~~~~~~~
> > /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:31:84: error:
> > in-class initialization of static data member ‘int
> > sync_short_impl::ios []’ of incomplete type
> >   tic int ios[] = {sizeof(gr_complex), sizeof(float), sizeof(float),
> > sizeof(float)};
> >                                                                       
> >              ^
> > /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:32:31: error:
> > ‘ios’ is not a type
> >   static std::vector<int> iosig(ios, ios+sizeof(ios)/sizeof(int));
> >                                 ^
> > /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:32:36: error:
> > ‘ios’ is not a type
> >   static std::vector<int> iosig(ios, ios+sizeof(ios)/sizeof(int));
> >                                      ^
> > /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:32:39: error:
> > expected ‘,’ or ‘...’ before ‘+’ token
> >   static std::vector<int> iosig(ios, ios+sizeof(ios)/sizeof(int));
> >                                         ^
> > /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc: In
> > constructor ‘sync_short_impl::sync_short_impl(double, unsigned int,
> > bool, bool)’:
> > /home/john/myprefix/src/gr-ieee-80211/lib/sync_short.cc:35:39: error:
> > no matching function for call to ‘gr::io_signature::makev(int, int,
> > std::vector<int> (&)(int, int))’
> >      gr::io_signature::makev(4, 4, iosig),
> >                                         ^
> > In file included from
> > /home/john/myprefix/include/gnuradio/basic_block.h:30:0,
> >                   from
> > /home/john/myprefix/include/gnuradio/block.h:27,
> >                   from /home/john/myprefix/src/gr-ieee-
> > 80211/include/ieee802-11/sync_short.h:21,
> >                   from /home/john/myprefix/src/gr-ieee-
> > 80211/lib/sync_short.cc:17:
> > /home/john/myprefix/include/gnuradio/io_signature.h:100:17: note:
> > candidate: static gr::io_signature::sptr gr::io_signature::makev(int,
> > int, const std::vector<int>&)
> >       static sptr makev(int min_streams, int max_streams,
> >                   ^
> > /home/john/myprefix/include/gnuradio/io_signature.h:100:17: note:
> > no known conversion for argument 3 from ‘std::vector<int>(int, int)’
> > to ‘const std::vector<int>&’
> > lib/CMakeFiles/gnuradio-ieee802_11.dir/build.make:584: recipe for
> > target 'lib/CMakeFiles/gnuradio-ieee802_11.dir/sync_short.cc.o'
> > failed
> > make[2]: *** [lib/CMakeFiles/gnuradio-ieee802_11.dir/sync_short.cc.o]
> > Error 1
> > CMakeFiles/Makefile2:200: recipe for target 'lib/CMakeFiles/gnuradio-
> > ieee802_11.dir/all' failed
> > make[1]: *** [lib/CMakeFiles/gnuradio-ieee802_11.dir/all] Error 2
> > Makefile:138: recipe for target 'all' failed
> > make: *** [all] Error 2
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